Remove calls to string.{join,lower,upper} (#174)
Remove calls to string.{join,lower,upper} (#174)

* Remove calls to string.{join,lower,upper}

The functions are not present in Python 3.8.

Signed-off-by: Gaël Écorchard <f4210d92d1c790e506ea161584185498ad209fa3@cvut.cz>

* Revert unrelated changes

Signed-off-by: Gaël Écorchard <f4210d92d1c790e506ea161584185498ad209fa3@cvut.cz>
ros/dynamic_reconfigure,ros/dynamic_reconfigure,ros/dynamic_reconfigure